Abstract
Weld joints in fixed marine platforms must be highly reliable. Certain zones of the weld seam may be very hard and hence may act as stress concentrators. Therefore, in some cases, additional heat treatment is required after welding. The microhardness of the basic sections in the weld joint of microalloyed low-carbon streel sheet (thickness 60 mm) obtained by thermomechanical rolling is investigated. Two-coordinate measurements of the microhardness in the basic thermal-influence zones are described. The influence of postweld heat treatment on the microhardness of opposite walls of the weld joint is determined.
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References
Permyakov, I.L., Frantov, I.I., Bortsov, A.N., and Mentyukov, K.Yu., Improvement of weldability and evaluation criteria for high-strength pipe steel heataffected zone reliability, Metallurgist (Moscow), 2012, vol. 55, no. 11, pp. 925–934.
Permyakov, I.L., Frantov, I.I., and Bortsov, A.N., The kinetics of the austenite phase transformations in the weld zone and heat affected zone during welding of microalloyed pipe steel, Probl. Chern. Metall. Materialoved., 2011, no. 3, pp. 38–49.
Ivanov, A.Yu., Sulyagin, R.V., Orlov, V.V., and Kruglova, A.A., Structure and properties of weld joints in X80, X90, and K70 pipe steel, Steel Transl., 2011, 41, no. 7, p. 611.
Funderburk, S.R., Key concepts in welding engineering-post weld heat treatment, Weld. Innovation, 1998, vol. 15, no. 2, pp. 15–16.
Singh, D., Sharma, M., and Gill, J., Effect of post weld heat treatment on the toughness and microstructural property of P-91 steel weldment, Int. J. Res. Mech. Eng. Technol., 2013, vol. 3, no. 2, pp. 216–219.
European Standard 10225, Weldable Structural Steels for Fixed Offshore Structures—Technical Delivery Conditions, Brussels, 2009.
Bokachev, Yu.A., Sarkits, I.G., and Goli-Oglu, E.A., NLMK-DanSteel: production of plates and heavy slabs, Metallurgist (Moscow), 2014, vol. 58, no. 5, pp. 401–405.
ASM Metals Handbook, Vol. 6: Welding, Brazing, and Soldering, Materials Park, OH: ASM Int., 1994.
Ivanov, A.Yu., Sulyagin, R.V., Orlov, V.V., and Kruglova, A.A., Formation of structure in the heat-affected zone and properties of welded joints of pipe steels of strength classes X80 and X90, Met. Sci. Heat Treat., 2012, vol. 53, no. 11, pp. 560–566.
Velichko, A.A., Bortsov, A.N., Shabalov, I.P., Frantov, I.I., and Utkin, I.Yu., Relationship between thermal processes in welds and their morphology and promising types of welds for thick-walled electricwelded pipes, Metallurgist (Moscow), 2014, vol. 58, no. 3, pp. 199–206.
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Original Russian Text © E.A. Goli-Oglu, 2016, published in Stal’, 2016, No. 5, pp. 54–56.
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Goli-Oglu, E.A. Influence of heat treatment after welding on the microhardness of steel joints in marine platforms. Steel Transl. 46, 361–363 (2016). https://doi.org/10.3103/S0967091216050065
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DOI: https://doi.org/10.3103/S0967091216050065